The Elder Scrolls V: Skyrim Wiki Guide

Creatures

There are various Creatures in Skyrim, each given a level that determines the creature's overall power and how what kind of Soul Gem is required for trapping it. Some enemies level with your character, and in the chart below their levels are marked with a "+" to indicate that their actual levels may be higher. As well, different creatures drop different items--the unique item drops are listed in the table below.